Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
thieu sach » chieu sach, thien hach, hieu cach
tranh chua » tranh cua, tranh chap, trinh chu
cang thang » cong thanh, dang thanh
hoc thieu » toc thieu, hoc hien
dong cang » dong bang, dong cong, dong cung
ban cau » bang cau, van cau, ban dau
ban can » ban dan, ban hang, ban hanh

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 - canh ((tranh chua) or (trinh chuan)) dong cang thang ((ban cau) OR (ban can))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - canh ((tranh chua) OR (trinh chuan)) dong cang thang ((ban cau) OR (ban can)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - canh ((tranh chua) or (trinh chuan)) dong cang thang ((ban cau) OR (ban can))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - canh ((tranh chua) or (trinh chuan)) dong cang thang ((ban cau) OR (ban can))*.