Perhaps you should try some spelling variations:
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
van am » van nam, van lam, van dam
di ve » dai ve, do ve, di le

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 xa hoi. thi van am thuc dan hanh ((di ve) or (de ve)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. thi van am thuc dan hanh ((di ve) OR (de ve)) triet.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. thi van am thuc dan hanh ((di ve) or (de ve)) triet*.