Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh vi » hanh vi, thanh va, thanh ve
luoc van » luoc can, luoc va, luot van
luc van » luu van, duc van, luc va
sach ly » sach y, sach lo, sach ty
va nhan » van nhan, ca nhan, va phan
mai hoi » mai khoi, dai hoi, lai hoi
ly nang » ky nang, ly hang, ly vang
tu tren » tu truyen, tu tieng, tu trong
ma hoi » xa hoi, ma hoa, me hoi
vi tu » vi tut, voi tu, va tu

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 ly nang ((ma hoi) or (mai hoi)). lieu va nhan ((luc van) OR (luoc van)) thanh vi tu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ly nang ((ma hoi) OR (mai hoi)). lieu va nhan ((luc van) OR (luoc van)) thanh vi tu tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ly nang ((ma hoi) or (mai hoi)). lieu va nhan ((luc van) OR (luoc van)) thanh vi tu tren".
• Adding a wildcard symbol may retrieve word variants: thuat sach ly nang ((ma hoi) or (mai hoi)). lieu va nhan ((luc van) OR (luoc van)) thanh vi tu tren*.