Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
tai cua » thai cua, tai cuc, tri cua
tuc van » thuc van, truc van, tuc va
nam tuc » nam thuc, nam truc, nam tu
hoc anh » hoc nganh, hoc nhanh, ngoc anh
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
va nam » van nam, ha nam, va nay
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc anh) or (dac sac)) ky ((nang xa) OR (lang xa)) hoi. hieu va nam tuc van hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc anh) OR (dac sac)) ky ((nang xa) OR (lang xa)) hoi. hieu va nam tuc van hanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc anh) or (dac sac)) ky ((nang xa) OR (lang xa)) hoi. hieu va nam tuc van hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((hoc anh) or (dac sac)) ky ((nang xa) OR (lang xa)) hoi. hieu va nam tuc van hanh tai cua te*.