Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cham truc » cau truc, nham thuc, pham thuc
sach ty » sach y, sach tu, sach thu
hang ca » nang cao, hang tai, hang dau
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
su hien » su kien, su tien, thu hien
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: thuat sach ty ((hang ca) or (hang va)) hoi. hieu ve cham truc va danh vi su hien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty ((hang ca) OR (hang va)) hoi. hieu ve cham truc va danh vi su hien.
• Adding a wildcard symbol may retrieve word variants: thuat sach ty ((hang ca) or (hang va)) hoi. hieu ve cham truc va danh vi su hien*.