Perhaps you should try some spelling variations:
gianh lai » gian lan
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham duc » pham duc, cham soc, pham duy
va gianh » va gian, van giang, va giai
chau tre » chay tren, chau tho, cau tra
sach ty » sach tu, sach thu, xach tay
cao hoi » cau hoi, co hoi, cao hoc
cho tre » cho thue, khoe tre

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (sach y)) nang cao hoi. hieu van cham duc va gianh lai ((chau tre) or (cho tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) nang cao hoi. hieu van cham duc va gianh lai ((chau tre) OR (cho tre)).
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach y)) nang cao hoi. hieu van cham duc va gianh lai ((chau tre) or (cho tre))*.