Perhaps you should try some spelling variations:
trinh tham » trinh cham, trinh tam, trinh kham
tranh tham » tranh thai, tranh chap, thanh thao
nhung cong » dung cong, thong cong, hang cong
hoc khien » hoc nghien, hoc thieu, hoc vien
cong van » cong vang, cong san, song van
van tan » van tuan, van ban, van tai
tan tap » toan tap, han tap, tan tat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc khien) OR (hoc hien)) bang - canh ((tranh tham) or (trinh tham)) nhung cong van tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc khien) OR (hoc hien)) bang - canh ((tranh tham) OR (trinh tham)) nhung cong van tan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc khien) OR (hoc hien)) bang - canh ((tranh tham) or (trinh tham)) nhung cong van tan tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc khien) OR (hoc hien)) bang - canh ((tranh tham) or (trinh tham)) nhung cong van tan tap*.