Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach y, sach tu, sach thu
va danh » va dinh, va dan, va hanh
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
ty nang » ky nang, ty xang, ty hang
cam tu » cam thu, dam tu, tam tu
nam tu » nam thu, nam thuc
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang x ho. hieu va ((cam tu) OR (nam tu)) ((va thanh) OR (va danh)) ki su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang x ho. hieu va ((cam tu) OR (nam tu)) ((va thanh) OR (va danh)) ki su triet".
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang x ho. hieu va ((cam tu) OR (nam tu)) ((va thanh) OR (va danh)) ki su triet*.