Perhaps you should try some spelling variations:
thanh nam » hanh nam, thanh tam, thanh pham
thanh dam » thanh dat, thanh tam, thanh lam
cuoi tre » tuoi tre, choi tre, cho tre
hieu van » hieu va, thien van, lieu va
cam tuc » cam xuc, cam tu, nam thuc
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
van cam » van nam, van lam, van cau
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: tu sach y ((nang xa) OR (nang ma)) hoi. hieu van cam tuc va ((thanh dam) or (thanh nam)) cuoi tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (nang ma)) hoi. hieu van cam tuc va ((thanh dam) OR (thanh nam)) cuoi tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) OR (nang ma)) hoi. hieu van cam tuc va ((thanh dam) or (thanh nam)) cuoi tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) OR (nang ma)) hoi. hieu van cam tuc va ((thanh dam) or (thanh nam)) cuoi tre*.