Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh lam » thanh lap, hanh kem, hanh va
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
lam cua » nam cua, lam chat
cua tre » cua te, cuu tre, cua triet
luc va » duc va, loc 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: thuat sach y ((nang x) or (lang xa)) hoi. hieu ve cham ((luc va) or (tuc va)) hanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang x) OR (lang xa)) hoi. hieu ve cham ((luc va) OR (tuc va)) hanh lam cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang x) or (lang xa)) hoi. hieu ve cham ((luc va) or (tuc va)) hanh lam cua tre*.