Perhaps you should try some spelling variations:
cham duoc » cham soc, pham duc, che duoc
thanh van » thanh toan, thanh phan, thanh nhan
duoc ma » duoc lam
te sach » toc sach
sach ly » sach y, sach lo, sach ty
va cham » va chat, va tham
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
cua tuc » cua duc, cua thuoc, luat tuc
nang o » nang co, nang ho, nang ro
cua tu » cua su, cua cu, cua te
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 ma ((thanh van) or (thanh san)) ((cua tu) OR (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang o hoi. hieu va cham duoc ma ((thanh van) OR (thanh san)) ((cua tu) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang o hoi. hieu va cham duoc ma ((thanh van) or (thanh san)) ((cua tu) OR (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang o hoi. hieu va cham duoc ma ((thanh van) or (thanh san)) ((cua tu) OR (cua tuc))*.