Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thi nang » thi cong, ki nang, thi hanh
vu sach » vu bach, su sach, vu khach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, bai cua
lai cua » dai cua, hai cua, thai cua
ma hoi » mai hoi, xa hoi, ma hoa
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: vu sach thi nang ma hoi. hieu ve cam duc va danh ((vai cua) or (((lai cua) or (lai chau)))) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach thi nang ma hoi. hieu ve cam duc va danh ((vai cua) OR (((lai cua) OR (lai chau)))) triet.
• Adding a wildcard symbol may retrieve word variants: vu sach thi nang ma hoi. hieu ve cam duc va danh ((vai cua) or (((lai cua) or (lai chau)))) triet*.