Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, nhung don
hoc thien » hoc hien, hoc thieu, hoc thiet
trinh van » trinh han, trinh quan, trinh toan
hang cong » dang cong, hang nong, bang cong
dan toan » van toan, dan than, manh toan
toan ban » van ban
tinh va » tich va, trinh vat, tinh gia

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 hach - nhanh ((tinh va) or (trinh van)) ((nhung cong) or (hang cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - nhanh ((tinh va) OR (trinh van)) ((nhung cong) OR (hang cong)) dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - nhanh ((tinh va) or (trinh van)) ((nhung cong) or (hang cong)) dan toan ban*.