Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
thieu sach » chieu sach, hieu cach, thieu cac
manh trung » manh tung, thanh trung, manh hung
nhung cong » dung cong, thong cong, hang cong
theo sach » thuoc sach, te sach, theo lich
trung vap » trung cap, trung va, trung van
vap nhung » va nhung, ve nhung, voi nhung
cong san » cong tac
san khan » san khau, san khac, san phan
khan cap » khan ap, than cap, khoan cam

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)) - manh trung vap nhung cong san khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu sach) OR (theo sach))) OR (thien hach)) - manh trung vap nhung cong san khan cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu sach) or (theo sach))) or (thien hach)) - manh trung vap nhung cong san khan cap*.