Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
dan than » dan chan, ban than, van than
tung va » trung va, tuong va, dung va
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (hoc thieu)) tinh - thanh tung va hang cong ((xuan toan) or (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (hoc thieu)) tinh - thanh tung va hang cong ((xuan toan) OR (dan than)) cao.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (hoc thieu)) tinh - thanh tung va hang cong ((xuan toan) or (dan than)) cao*.