Perhaps you should try some spelling variations:
nang chat » nang phat, nang cham, nang cao
van hanh » van thanh, ban hanh, van anh
chat hoc » chat hoa, chat thom, cho hoc
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
va hanh » va danh, ban hanh, dao hanh
su tien » su kien, su hien, tu tieng
sach ly » sach y, sach lo, sach ty
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
va cam » va cham, va cac, va cao
vi su » va su, ve su, ki su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly nang chat hoc. hieu va cam tuc ((((va hanh) OR (va thanh))) or (van hanh)) vi su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang chat hoc. hieu va cam tuc ((((va hanh) OR (va thanh))) OR (van hanh)) vi su tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang chat hoc. hieu va cam tuc ((((va hanh) OR (va thanh))) or (van hanh)) vi su tien".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang chat hoc. hieu va cam tuc ((((va hanh) OR (va thanh))) or (van hanh)) vi su tien*.