Perhaps you should try some spelling variations:
thien van » thi van
va triet » va thiet, va trien, ve triet
lang dao » lanh dao, lang cao, lang dai
va lang » va nang, hoa lang
cam luc » cam xuc, cau luc
te sach » toc sach
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
luc va » duc va, tuc va, loc va
dao va » dao van, tao va, do va

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 nang) or (ty hang)) mai hoi. ((hieu ve) or (thien van)) cam luc va lang dao va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ty hang)) mai hoi. ((hieu ve) OR (thien van)) cam luc va lang dao va triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) or (ty hang)) mai hoi. ((hieu ve) or (thien van)) cam luc va lang dao va triet*.