Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
hanh dai » hanh tai, hanh dao, vanh dai
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
tuc van » thuc van, truc van, tuc va
cau tuc » cau truc, cau tu, cau luc
van cau » van dau, van hau, van chat
dai hoa » dai khoa, dai hoc, dai hoi
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thuat lanh)) ky ((nang xa) or (nang ma)) hoi. hieu van cau tuc van hanh dai hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat lanh)) ky ((nang xa) OR (nang ma)) hoi. hieu van cau tuc van hanh dai hoa viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat lanh)) ky ((nang xa) or (nang ma)) hoi. hieu van cau tuc van hanh dai hoa viet*.