Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc thiet
thang cua » thong cua, hang cua, than cua
trung cua » truong cua, trung tuan, trung cap
van tan » van tuan, van ban, van thanh
van tai » von tai, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien thanh - hanh ((thang cua) or (trung cua)) nhung cong ((van tan) OR (van tai)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien thanh - hanh ((thang cua) OR (trung cua)) nhung cong ((van tan) OR (van tai)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien thanh - hanh ((thang cua) or (trung cua)) nhung cong ((van tan) OR (van tai)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thien thanh - hanh ((thang cua) or (trung cua)) nhung cong ((van tan) OR (van tai)) cao*.