Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
nang tai » hang tai, tang tai, sang tai
hieu van » hieu va, thien van, lieu va
van nham » van nam, van nhan, van tham
thuc dan » thuc hanh, thuc vat
hanh dao » lanh dao, thanh dat, doanh dao
vu sach » vu bach, su sach, vu khach
tai hoi » tai khoi, dai hoi, tai hai
sach ky » sac ky, sach y, sach ty
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 nham ((thuc dan) OR (hoc dan)) ((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 nham ((thuc dan) OR (hoc dan)) ((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 nham ((thuc dan) OR (hoc dan)) ((hanh dao) or (thanh dam)) cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang tai hoi. hieu van nham ((thuc dan) OR (hoc dan)) ((hanh dao) or (thanh dam)) cua te*.