Perhaps you should try some spelling variations:
tranh chuan » trinh chuan, tranh chua, tranh cua
thuat lanh » thuat lap, thuat san
hoc thuat » hoc thuyet, hoc thuc, hoc chat
dong cong » duong cong, dung cong, cong cong
dang cong » dung cong
thang ban » hang ban, tang ban, thanh ban
ban dan » ban hang, ban hanh, ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuat lanh - canh tranh chuan ((dong cong) or (dang cong)) thang ban dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuat lanh - canh tranh chuan ((dong cong) OR (dang cong)) thang ban dan.
• Adding a wildcard symbol may retrieve word variants: hoc thuat lanh - canh tranh chuan ((dong cong) or (dang cong)) thang ban dan*.