Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
thieu sach » chieu sach, hieu cach, thieu cac
nhung cong » dung cong, thong cong, hang cong
theo sach » thuoc sach, te sach, theo lich
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
cong tinh » cong trinh, cong vinh, long tinh
tran van » luan van
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((thieu sach) or (theo sach))) or (thien hach)) - hanh tran van nhung cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu sach) OR (theo sach))) OR (thien hach)) - hanh tran van nhung cong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu sach) or (theo sach))) or (thien hach)) - hanh tran van nhung cong tinh toan cau*.