Perhaps you should try some spelling variations:
phap thuc » phap thu, phap tu
phap hoc » phap hoan, phap mo, phap han
vu sach » vu bach, su sach, vu khach
danh tu » anh tu, doanh thu
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, me hoi
tu cua » hu cua, vu cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang ((ma hoi) or (ma hoa)). hieu va ((phap thuc) OR (phap hoc)) va danh tu cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang ((ma hoi) OR (ma hoa)). hieu va ((phap thuc) OR (phap hoc)) va danh tu cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang ((ma hoi) or (ma hoa)). hieu va ((phap thuc) OR (phap hoc)) va danh tu cua te*".