Perhaps you should try some spelling variations:
thieu hach » thien hach, chieu sach, hieu cach
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
tan van » tran van, tang van, dang van
luan » quan, lan

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 hach - hanh ((trung cua) or (trung cap)) nhung cong ((tan van) OR (luan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu hach - hanh ((trung cua) OR (trung cap)) nhung cong ((tan van) OR (luan van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu hach - hanh ((trung cua) or (trung cap)) nhung cong ((tan van) OR (luan van)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu hach - hanh ((trung cua) or (trung cap)) nhung cong ((tan van) OR (luan van)) ban*.