Perhaps you should try some spelling variations:
cham duoc » pham duc, che duoc, nam duoc
thanh van » thanh toan, thanh phan, thanh nhan
sach ly » sach y, sach lo, sach ty
te sach » toc sach
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
nang o » nang co, nang ho, nang ro
cua tu » cua tuc, cua su, cua cu
o hoi » co hoi, o hoc, o hai

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 ly nang o hoi. hieu va ((cham duoc) OR (cham soc)) ma ((thanh van) or (thanh san)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang o hoi. hieu va ((cham duoc) OR (cham soc)) ma ((thanh van) OR (thanh san)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang o hoi. hieu va ((cham duoc) OR (cham soc)) ma ((thanh van) or (thanh san)) cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang o hoi. hieu va ((cham duoc) OR (cham soc)) ma ((thanh van) or (thanh san)) cua tu*.