Perhaps you should try some spelling variations:
dung khai » dung hai, dang khai, dung khi
hieu van » hieu va, thien van, lieu va
van dung » van dong, xay dung, tin dung
khai cau » khai cac, phan cau, hai chau
cau theo » cau thi, cau tao
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
sang ma » tang ma, nang ma, sang tao
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ly ((sang ma) or (nang cao)) hoi. hieu van cam tuc van dung khai cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((sang ma) OR (nang cao)) hoi. hieu van cam tuc van dung khai cau theo.
• Adding a wildcard symbol may retrieve word variants: su sach ly ((sang ma) or (nang cao)) hoi. hieu van cam tuc van dung khai cau theo*.