Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dua tren » dung tren
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
nam luu » nam suu, tam luu, nam luat
luu van » cuu van, luan van, luu hanh
te sach » toc sach
tu sach » thu sach, su sach, tu cach

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ty nang xa hoi. hieu van nam luu van hanh lai ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty nang xa hoi. hieu van nam luu van hanh lai ((dua tren) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ty nang xa hoi. hieu van nam luu van hanh lai ((dua tren) or (cua triet))*.