Perhaps you should try some spelling variations:
thien van » thi van
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
cam tuc » cam xuc, cam tu, nam thuc
hanh va » hang va, hanh vi
tuc van » thuc van, truc van, tuc va
van cam » van nam, van lam, van cau
sach ky » sac ky, sach y, sach kem
tang xa » trang xa, tang ma, lang xa
sach ty » sach y, sach tu, sach thu
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: te ((sach ky) or (sach ty)) tang xa hoi. thien van cam tuc van hanh va ((va triet) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) tang xa hoi. thien van cam tuc van hanh va ((va triet) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach ty)) tang xa hoi. thien van cam tuc van hanh va ((va triet) or (cua tu))*.