Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
tung tuan » trung tuan, quang tuan, trang tuan
hung tuan » hung tran, quang tuan, trung tuan
hang cong » dang cong, hang nong, bang cong
cong manh » cong danh, duong manh, cong thanh

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 tuan) OR (hung tuan)) hang cong manh ((toan ban) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - thanh ((tung tuan) OR (hung tuan)) hang cong manh ((toan ban) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - thanh ((tung tuan) OR (hung tuan)) hang cong manh ((toan ban) or (van ban))".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - thanh ((tung tuan) OR (hung tuan)) hang cong manh ((toan ban) or (van ban))*.