Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
chinh chau » chinh cho, chinh phu, minh chau
hoc thien » hoc hien, hoc thieu, hoc thiet
chinh cau » chinh ca, chinh can, chinh tai
cong lan » cong luan, cong lang, cong san

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 - ((thanh tung) OR (thanh cong)) va nhung cong lan ((chinh cau) or (chinh chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - ((thanh tung) OR (thanh cong)) va nhung cong lan ((chinh cau) OR (chinh chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - ((thanh tung) OR (thanh cong)) va nhung cong lan ((chinh cau) or (chinh chau))".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - ((thanh tung) OR (thanh cong)) va nhung cong lan ((chinh cau) or (chinh chau))*.