Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
trinh han » trinh quan
tinh vai » tinh va, tinh hai, tinh bai
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
gian cau » gian chau, gian cac, gian 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 tinh - canh ((tinh vai) or (trinh han)) tong ((cong dan) OR (cong tan)) gian cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - canh ((tinh vai) OR (trinh han)) tong ((cong dan) OR (cong tan)) gian cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - canh ((tinh vai) or (trinh han)) tong ((cong dan) OR (cong tan)) gian cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - canh ((tinh vai) or (trinh han)) tong ((cong dan) OR (cong tan)) gian cau*.