Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
phat duc » pham duc, phan duc, phan duoc
duc minh » duc anh
hang van » hoang van, dang van, tang van
va triet » va thiet, va trien, ve triet
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ty nang ((ma hoi) or (ma hoa)). hieu va phat duc minh ((hang van) or (hang va)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty nang ((ma hoi) OR (ma hoa)). hieu va phat duc minh ((hang van) OR (hang va)) va triet.
• Adding a wildcard symbol may retrieve word variants: thuat sach ty nang ((ma hoi) or (ma hoa)). hieu va phat duc minh ((hang van) or (hang va)) va triet*.