Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
van hac » van hoc, van ha, van hai
vai cua » dai cua, hai cua, lai cua
bac va » ban va, bac ha, bao va
cua tu » cua tuc, cua su, cua cu

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)) ty lang xa hoi. hieu van hac ((bac va) or (duc va)) hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (thuat sach)) ty lang xa hoi. hieu van hac ((bac va) OR (duc va)) hanh vai cua tu.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (thuat sach)) ty lang xa hoi. hieu van hac ((bac va) or (duc va)) hanh vai cua tu*.