Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
lam chau » lai chau, lam chu, lam chat
hanh lam » thanh lap, hanh kem, hanh va
chau tre » chay tren, chau tho, cho tre
dang xay » dang van, van xay
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
loc va » hoc va, luc va
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((nang x) or (dang xay)) hoi. hieu va cam ((loc va) or (tuc va)) hanh lam chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang x) OR (dang xay)) hoi. hieu va cam ((loc va) OR (tuc va)) hanh lam chau tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang x) or (dang xay)) hoi. hieu va cam ((loc va) or (tuc va)) hanh lam chau tre*.