Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
nham thuc » nhan thuc, nam thuc, nham thu
nang tai » hang tai, tang tai, sang tai
hieu van » thien van, lieu va, hieu ve
hanh dao » lanh dao, thanh dat, doanh dao
vu sach » vu bach, su sach, vu khach
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
tai hoi » tai khoi, dai hoi, tai hai
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: vu sach ky nang tai hoi. ((hieu van) OR (hieu va)) nham thuc va ((hanh dao) or (thanh dam)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang tai hoi. ((hieu van) OR (hieu va)) nham thuc va ((hanh dao) OR (thanh dam)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang tai hoi. ((hieu van) OR (hieu va)) nham thuc va ((hanh dao) or (thanh dam)) cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang tai hoi. ((hieu van) OR (hieu va)) nham thuc va ((hanh dao) or (thanh dam)) cua te*.