Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua khong, suat thong
trinh han » trinh quan
cua tong » cua cong, cua dong, cua song
cua nong » cua cong, cuu nong, cua dong
han cao » han cho, han gao, hoang cao

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 tinh - hanh tranh ((cua thong) or (((cua tong) OR (cua nong)))) cong trinh han cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - hanh tranh ((cua thong) OR (((cua tong) OR (cua nong)))) cong trinh han cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - hanh tranh ((cua thong) or (((cua tong) OR (cua nong)))) cong trinh han cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - hanh tranh ((cua thong) or (((cua tong) OR (cua nong)))) cong trinh han cao*.