Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va danh, ban hanh
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cu tren » tu tren, dua tren
nang ma » tang ma, sang ma, nang cao
vai cu » vai cua, van cu
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang ma) or (nang x)) hoi. hieu ve cam xuc ((va hanh) or (va thanh)) vai cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang ma) OR (nang x)) hoi. hieu ve cam xuc ((va hanh) OR (va thanh)) vai cu tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang ma) or (nang x)) hoi. hieu ve cam xuc ((va hanh) or (va thanh)) vai cu tren*.