Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh lai » hanh lam, hanh tai, thanh lap
lai cua » dai cua, hai cua, lai chau
truc va » thuc va, thuc vat, trung va
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, tuc xa, duc va
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu hoach) or (thuat sach)) ky nang ma hoi. hieu ve cham ((tuc va) or (truc va)) hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (thuat sach)) ky nang ma hoi. hieu ve cham ((tuc va) OR (truc va)) hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (thuat sach)) ky nang ma hoi. hieu ve cham ((tuc va) or (truc va)) hanh lai cua tre*.