Perhaps you should try some spelling variations:
thien van » thi van
thanh ly » thanh lay, thanh ky, thanh le
luoc can » luc canh, hoc can, luoc dai
hieu van » hieu va, lieu va, hieu ve
luoc van » luoc va, luc van, luot van
te sach » toc sach
sach ly » sach y, sach lo, sach ty
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
ly cua » le cua

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