Perhaps you should try some spelling variations:
thang dau » xang dau, thanh dat, nang dau
su triet » su viet, su tien, ve triet
hang dau » hang va, hang tai
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
hieu ke » hieu kem, chieu ke, hieu ky
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
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: vu sach ty nang xa hoi. hieu ke ((thang dau) OR (hang dau)) ((va hanh) or (va thanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang xa hoi. hieu ke ((thang dau) OR (hang dau)) ((va hanh) OR (va thanh)) vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang xa hoi. hieu ke ((thang dau) OR (hang dau)) ((va hanh) or (va thanh)) vi su triet".
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang xa hoi. hieu ke ((thang dau) OR (hang dau)) ((va hanh) or (va thanh)) vi su triet*.