Perhaps you should try some spelling variations:
thu tien » thuc tien, thu tieng, thuy tien
hai luom » hai luong, hai muoi, hai huoc
nang mai » nang ma, nang tai, lang mai
dau thu » dau thau, dau tu, dat thu
va nang » van nang, da nang, cam nang
va hang » van hang, va lang, va hanh
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang

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 mai hoi. ((hieu va) or (hieu qua)) hai luom ((va hang) or (va nang)) dau thu tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang mai hoi. ((hieu va) OR (hieu qua)) hai luom ((va hang) OR (va nang)) dau thu tien.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang mai hoi. ((hieu va) or (hieu qua)) hai luom ((va hang) or (va nang)) dau thu tien*.