Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
va danh » va dinh, va dan, va hanh
cam tuc » cam xuc, cam tu, nam thuc
sach ly » sach y, sach lo, sach ty
van cam » van nam, van lam, van cau
hang ca » nang cao, hang tai, hang dau
tuc va » thuc va, truc va, tuc xa
vi su » va su, ve su, oi su
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: thuat sach ly ((hang ca) or (hang va)) hoi. hieu van cam tuc va danh ((vi su) OR (ki su)) tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ly ((hang ca) OR (hang va)) hoi. hieu van cam tuc va danh ((vi su) OR (ki su)) tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ly ((hang ca) or (hang va)) hoi. hieu van cam tuc va danh ((vi su) OR (ki su)) tien".
• Adding a wildcard symbol may retrieve word variants: thuat sach ly ((hang ca) or (hang va)) hoi. hieu van cam tuc va danh ((vi su) OR (ki su)) tien*.