Perhaps you should try some spelling variations:
phuong bang » phuong hoang, phuong giang, phuong quang
phuong ban » phuong lan, phuong bac, phong ban
thanh chau » thanh cha, thanh cham, thanh chu
hanh tang » hanh trang, anh tang, hanh mang
thanh cau » thanh mau, nhanh cau, thanh ca
hoc dieu » hoc thieu, hoc hien
tang vat » tang van, dang vat, bang vat
vat dung » van dung, va dung, viet dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dieu hanh - hanh tang vat dung ((phuong ban) or (phuong bang)) ((thanh cau) OR (thanh chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu hanh - hanh tang vat dung ((phuong ban) OR (phuong bang)) ((thanh cau) OR (thanh chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc dieu hanh - hanh tang vat dung ((phuong ban) or (phuong bang)) ((thanh cau) OR (thanh chau))".
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - hanh tang vat dung ((phuong ban) or (phuong bang)) ((thanh cau) OR (thanh chau))*.